Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
An obese eight year old spayed Peke-Cocker mix was admitted by owners who noticed an enlarged area in the perineum. A subcutaneous palpable mass of approximately 3 cm diameter was found in the right perineal region adjacent to the anal sac.
Carpenter, Lee; McNeel, Sandra; and Grier, Ronald
"What's Your Radiographic Diagnosis?,"
Iowa State University Veterinarian: Vol. 44
, Article 13.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol44/iss2/13